7212 ACD/P4ATBTA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7212 ACD/P4ATBTA Bearing Product Overview & Core Advantages
The 7212 ACD/P4ATBTA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set consists of three bearings pre-configured to deliver superior performance under combined radial and axial loads. Manufactured to P4A tolerance class with an extra light preload (Class A), it ensures minimal runout and vibration, making it ideal for high-speed spindles and precision machinery where positional accuracy is critical.
7212 ACD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7212 | Basic bearing series with 60mm bore, 110mm OD |
| ACD | 25° contact angle design for optimal axial load capacity |
| P4A | High precision tolerance class with specific running accuracy requirements |
| TBT | Triplex Back-to-Back arrangement for maximum rigidity |
| A | Extra light preload classification for minimal friction |
7212 ACD/P4ATBTA Bearing Structural Features & Performance Benefits
Enhanced Rigidity: The triplex back-to-back configuration creates an exceptionally stiff bearing system that resists deflection under heavy combined loads, maintaining precision alignment in demanding applications.
Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing set delivers excellent performance for both radial loads (26,775 lbf dynamic rating) and axial loads in both directions.
High-Speed Capability: The phenolic cage material and precision manufacturing enable operation at limiting speeds up to 36,000 rpm, making it suitable for high-speed spindle applications.
Precision Performance: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, this bearing ensures minimal runout and consistent performance in precision machinery.
7212 ACD/P4ATBTA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring precision and rigidity
- Precision Rotary Tables: Indexing and positioning systems demanding high accuracy
- High-Speed Machining Centers: Applications requiring both speed and precision
- Industrial Robotics: Precision joints and rotary actuators
- Aerospace Test Equipment: Precision positioning and motion control systems
